Siting them close to data centers, and connecting them to grid is easy because the utility controlled grid wants the datacenter customer. Utilities are slow to connect solar because they either own or can be bribed by existing FF plants.

A grid connection allows oversizing the solar production, and exporting. But where massive datacenter expansion strains the grid is during daytime peaks. Solar and batteries locally avoids that congestion, and then grid can provide energy and better utilize grid at night.